[FFmpeg-cvslog] yop: Check return value of avio_seek and avoid modifying state if it fails

[Joakim Plate]

ffmpeg | branch: master | Joakim Plate <elupus at ecce.se> | Fri Feb  3 19:13:45 2012 +0000| [b69c2e0e6dab87bb90fece1d0de47c28394aa8e6] | committer: Justin Ruggles

yop: Check return value of avio_seek and avoid modifying state if it fails

Signed-off-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b69c2e0e6dab87bb90fece1d0de47c28394aa8e6
---

 libavformat/yop.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavformat/yop.c b/libavformat/yop.c
index e500259..f10d8b6 100644
--- a/libavformat/yop.c
+++ b/libavformat/yop.c
@@ -184,8 +184,6 @@ static int yop_read_seek(AVFormatContext *s, int stream_index,
     int64_t frame_pos, pos_min, pos_max;
     int frame_count;
 
-    av_free_packet(&yop->video_packet);
-
     if (!stream_index)
         return -1;
 
@@ -196,9 +194,13 @@ static int yop_read_seek(AVFormatContext *s, int stream_index,
     timestamp      = FFMAX(0, FFMIN(frame_count, timestamp));
 
     frame_pos      = timestamp * yop->frame_size + pos_min;
+
+    if (avio_seek(s->pb, frame_pos, SEEK_SET) < 0)
+        return -1;
+
+    av_free_packet(&yop->video_packet);
     yop->odd_frame = timestamp & 1;
 
-    avio_seek(s->pb, frame_pos, SEEK_SET);
     return 0;
 }